Loway



(No Model.)

J. W. GALLOWAY.

PORGING AND MIXING PUMP. No. 275,632.

9* Patented Apr. 10,1883.

N. PEYERS. mm-mmgnmr. Washinglun. o. c.

UNITED STATES PATENT OFFICE.

JAMES W. GALLOVVAY, OF BOLTON, COUNTY OF LANCASTER, ENGLAND.

FORCING AND MIXING PUMP.

\ SPECIFICATION forming part of Letters Patent No. 275,632, dated April10, 1883.

Application filed December 8, 1882. (No model.)

To all whom it may concern:

Be it known that 1, JAMES WILLIAM GAL- LOWAY, of the firm of JamesGalloway, of Bolton, in the county of Lancaster, England, have inventedan Improvement in Forcing or Mixing Pumps, of which the following is aSpecification. V

This invention relates to that part of the machine used for pumping gasand water for making aerated beverages (such, for instance, assoda-water, lemonade, gingerade, 8m.) called the forcing or mixing pump,and the invention consists, principally, in reducing the clearance inthe pump-barrel, when the piston or plunger is at the top of its strokewhen forcing the liquid, to a minimum. I

This invention is designed to overcome a want long felt by the trade,for in all such pumps made hitherto the clearance has been too great,owing to the long passages between the pump-barrel and the valves. Insuch cases the clearance is charged heavily with gas,which on the returnof the pump-plunger expands and partially fills the vacuum. Consequentlythe pump is unable to draw its full capacity. The clearance in the pumpis reduced by the novel method I adoptin making the piston or plunger,which is so constructed that it traverses the full length of the barreland completely empties it, or nearly so, thereby causing the pump todeliver its measured quantity of gas and water.

Such being the nature and object of my said invention, 1 will nowproceed to describe in detail the manner in which the same is to be ormay be performed or carried into practical flect, and in order that thesame may be clearly understood 1 have annexed hereunto a sheet ofdrawings illustrative thereof, and have marked the same with figures andletters in reference corresponding with those in the followingexplanation thereof.

Figure l in the annexed drawings is a part vertical section of theforcing or mixing pump of a machine for making aerated beverages, withthe arrangement of suction and delivery valves made andconstrnctedaccording to my invention. Fig. 2 is a sectional plan of Fig. 1' throughthe valves and openings for drawing and discharging the water and gas.Fig. 3 is a plan of the top of valve-box with the cap or cover over thesuction-valve removed. Fig. 4 is a transverse section through thevalve-box and suction-valve seat with the valve removed. Fig. 5 is asectional elevation of my improved plunger for forcing or mixing pump.Fig. 6 is an outside elevation of Fig. 5. Fig. 7 is a plan of under sideof plunger in Fig. 5. Fig. 8 is a plan of the top side of plunger inFig. 5.

A is part of the pump-barrel of forcing or mixing pump. On the top isplaced the valvebox B, containing the suction-valve (J and thedelivery-valve D. The suction-valve seat or casing is screwed into thevalve-box, the bottom endbeing provided with a facing, which drops orsits on the lip or seating E in the bottom end of the valve-box. Thespindle F is provided at the bottom with the collar G, on which theindia-rnbber washer G or its equivalent is secured by the nut a, thesame being kept to its face when the pump is standing orforcing bythelight spiral spring H. The

delivery-valve D is an ordinary winged valvev inverted, provided withthe leather washer J, or its equivalent, such as india-rubber, 8:0. Thevalves can be easily removed by unscrewing thecaps K, when thedelivery-valve D can be lifted out. The suction-valve G can, by placinga square die in the slots L, cut in the internal diameter for thepurpose, be unscrewed with an ordinary spanner. To make thejoint underthe caps K air and water tight the top side of the valve-box is providedwith the grooves M, over which is placed the leather washers N. When thepump is drawing, the gas and water enters the suction valve 0 throughthe pipes or openings 0 and the holes P in the suction-valve seat, whenthe gas and water unite immediately on entering the pumpbarrel, whenthey are forced through the delivery-valveD and the opening R on thereturnstroke of the plunger, and so on.

The pump or plunger rod S is provided at its extreme end with the collarT, which forms the end of the plunger. Midway, or thereabout, is placedthe metallic washer U, concaved on both sides, the outside beingprovided with the conical washers V, made of leather or other suitablematerial. The space between the metallic washer U, the collar T, and theadj usting-nut W is provided with the elastic packing-rings X, made ofindia-rubber, leather, or other equivalents. In most cases I prefer tomake the two top rings, I, of india-rubber, being more pliable andeasily operated upon by the adjusting-nut TV on the rod S, which can betightened without removal. By this arrangement the elastic packing isoperated upon by the adj usting-nut \V, causing a lateral pressure onthe edge of the conical washers V near the top end of the plunger, thusmaking it thoroughly air-tight with the least possible amountoffriction, as the plunger only fits the barrel A at the twoextremities. The upper end of the plunger, when at the top of itsstroke, almost strikes the under side of the valve-box B and the collarG" of the suction-valve, so as to drive all the gas and water out thatis possible, at the same time reducing the clearance.

Having now described the nature and object of this my said invention,together with the manner in which the same is to be or may be performedor carried into practical effect, I wish it to be understood that Iclaim as my invention 1. The comhinatiomwith the pump cylinder andpiston and suction-valve, ofa suction-pipe, G, the seat having holes 1?,the gas and water pipes O 0, connected therewith, the deliveryvalve D,and the pipe R, whereby the union of the gas and water is effected asthey enter the pump'barrel, and are forced through the delivery-valve onthe return-stroke, as described.

2. The combination, with a plunger-rod, S, threaded near and having acollar at its lower end, of the midway metallic washer, U, concaved onboth sides, the outer conical cupleathers b, the nut W, and thepacking-rings X, as shown, and for the purpose specified.

In witness whereof I, the said JAMES VILL- IAM GALLOWAY, have hereuntoset my hand and seal this 10th day of November, in the year of our Lord1882.

JAMES WlLLlMl GALLOWAY. [L. 3.]

Witnesses:

J OHN Hormooxs, EDMUND OHADWICK,

Both of Bolton.

